RMC TOKINA 'DOUBLER' 2X TELECONVERTER LENS (PENTAX P/KA MOUNT)


chrissinkpen

Link Posted 14/09/2009 - 11:49
Have been looking at buying one of these.
More advice would be appreciated. Would like to use with FA50F1.4

Regards

Chris

johnriley

Link Posted 14/09/2009 - 12:11
I'm not a big fan of teleconverters, but the 50mm lens is the best lens to use one with. The 50mm f1.7 would be a better choice still though.
Best regards, John

chrissinkpen

Link Posted 14/09/2009 - 12:37
Thanks John.
Wondered if you could explain your reason for not being "a big fan"?

regards

Chris

Hardgravity

Link Posted 14/09/2009 - 12:54
chrissinkpen wrote:
Thanks John.
Wondered if you could explain your reason for not being "a big fan"?

regards

Chris

The more layers of glass you introduce the lower the image quality.

I tried a 2X adaptor on a 300mm lens, the resulting images were VERY poor. That's an extreme example but it's the same for all lenses to some extent.
Cheers, HG

K110+DA40, K200+DA35, K3 and a bag of lenses, bodies and other bits.

Mustn't forget the Zenits, or folders, or...

I've some gallerieshere CLICKY LINK! and my PPG entries.

johnriley

Link Posted 14/09/2009 - 12:57
I'm not a big fan because the quality is invariably very poor.
Best regards, John

edumad

Link Posted 14/09/2009 - 13:40
I have this one, and its the best 2x tc I've tried. All tc's will reduce some IQ, but this one is not too bad. I also got a quantaray 2x tc (which I suppose is the same as the sigma, usual with quantaray) and in terms of sharpness I see no discernible difference except the tokina gives more purple fringing (nothing to bad).
TWAPSI Blog
Add a Comment
You must be registered or logged-in to comment.